____ made things worse, he said, was that his roommate never took part in any of the cleaning work．
| A．What | B．Which | C．That | D．Who |
She took it for granted ________ I'd be back home an hour ago.
| A．that | B．whether | C．if | D．when |
I asked her in English ________ she was, and she told me ________ she was an actress.
| A．who…that | B．who…X | C．what…X | D．how…that |
________ you have seen things like these before doesn't matter.
| A．If | B．Whether | C．What | D．When |
You will easily know ________ video recorders are the same.
| A．what those | B．that of those | C．that all of | D．which of those |
Can you point out ________ two radios are the best
| A．which | B．what | C．that | D．whether |